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| author | Francisco Jerez | 2016-01-14 03:59:39 +0100 |
|---|---|---|
| committer | Jani Nikula | 2016-01-15 10:33:52 +0100 |
| commit | 965fd602a6436f689f4f2fe40a6789582778ccd5 (patch) | |
| tree | 118879b2d2ac12db5e8d499f582127fed575e8f4 /drivers/gpu/drm/i915/intel_lrc.c | |
| parent | drm/i915: Use the active wm config for merging on ILK-BDW (diff) | |
| download | kernel-qcow2-linux-965fd602a6436f689f4f2fe40a6789582778ccd5.tar.gz kernel-qcow2-linux-965fd602a6436f689f4f2fe40a6789582778ccd5.tar.xz kernel-qcow2-linux-965fd602a6436f689f4f2fe40a6789582778ccd5.zip | |
drm/i915: Make sure DC writes are coherent on flush.
We need to set the DC FLUSH PIPE_CONTROL bit on Gen7+ to guarantee
that writes performed via the HDC are visible in memory. Fixes an
intermittent failure in a Piglit test that writes to a BO from a
shader using GL atomic counters (implemented as HDC untyped atomics)
and then expects the memory to read back the same value after mapping
it on the CPU.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91298
Tested-by: Mark Janes <mark.a.janes@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1452740379-3194-1-git-send-email-currojerez@riseup.net
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lrc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lrc.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c index 5027699c5291..f5d89c845ede 100644 --- a/drivers/gpu/drm/i915/intel_lrc.c +++ b/drivers/gpu/drm/i915/intel_lrc.c @@ -1735,6 +1735,7 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request, if (flush_domains) { flags |= PIPE_CONTROL_RENDER_TARGET_CACHE_FLUSH; flags |= PIPE_CONTROL_DEPTH_CACHE_FLUSH; + flags |= PIPE_CONTROL_DC_FLUSH_ENABLE; flags |= PIPE_CONTROL_FLUSH_ENABLE; } |